ipv6地址累加函数

Posted 2021-11-07 rivsidn

好不容易写的，指不定什么时候用的上。

#include <stdio.h>
#include <arpa/inet.h>

int main()
{
    int i;
    int ret;
    struct in6_addr addr6;
    char str[INET6_ADDRSTRLEN] = {0};

    ret = inet_pton(AF_INET6, "ff02::12", &addr6);
    if (ret != 1) {
        perror("inet_pton()");
        return -1;
    }

    printf("%08x %08x %08x %08x\n", (unsigned int)addr6.s6_addr32[0], 
            (unsigned int)addr6.s6_addr32[1], (unsigned int)addr6.s6_addr32[2], 
            (unsigned int)addr6.s6_addr32[3]);

#if 1
    for (i = 0; i < 125; i++) {
        (addr6.s6_addr32[3] += htonl(1)) ?: ((addr6.s6_addr32[2] += htonl(1)) ?: 
           ((addr6.s6_addr32[1] += htonl(1)) ?: (addr6.s6_addr32[0] += htonl(1))));
        
        if ((inet_ntop(AF_INET6, &addr6, str, INET6_ADDRSTRLEN)) != NULL) {
            printf("%s\n", str);
        } else {
            fprintf(stderr, "inet_ntop() error\n");
            return -1;
        }
    }
#endif

    return 0;
}